<!DOCTYPE html>
<html lang="zh=cn">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>复杂的按钮动画</title>
  <link rel="stylesheet" href="./style.css">
</head>

<body>
  <button class="btn" data-btn>Submit</button>
  <div class="check_box">
    <svg x="0px" y="0px" fill="none" class="check_svg" viewBox="0 0 25 30">
      <path d="M2,19.2C5.9,23.6,9.4,28,9.4,28L23,2" />
    </svg>
  </div>
</body>
<script src="./script.js" defer></script>

</html>